Linux CXL
 help / color / mirror / Atom feed
From: Davidlohr Bueso <dave@stgolabs.net>
To: dan.j.williams@intel.com
Cc: vishal.l.verma@intel.com, jonathan.cameron@huawei.com,
	fan.ni@samsung.com, dave.jiang@intel.com,
	a.manzanares@samsung.com, dave@stgolabs.net,
	linux-cxl@vger.kernel.org
Subject: [PATCH 1/3] cxl/memdev: Improve sanitize ABI descriptions
Date: Tue, 25 Jul 2023 22:19:38 -0700	[thread overview]
Message-ID: <20230726051940.3570-2-dave@stgolabs.net> (raw)
In-Reply-To: <20230726051940.3570-1-dave@stgolabs.net>

Be more detailed about the CPU cache management situation. The same
goes for both sanitize and secure erase.

Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
---
 Documentation/ABI/testing/sysfs-bus-cxl | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/Documentation/ABI/testing/sysfs-bus-cxl b/Documentation/ABI/testing/sysfs-bus-cxl
index 6350dd82b9a9..c4c4acb1f3b3 100644
--- a/Documentation/ABI/testing/sysfs-bus-cxl
+++ b/Documentation/ABI/testing/sysfs-bus-cxl
@@ -82,7 +82,11 @@ Description:
 		whether it resides in persistent capacity, volatile capacity,
 		or the LSA, is made permanently unavailable by whatever means
 		is appropriate for the media type. This functionality requires
-		the device to be not be actively decoding any HPA ranges.
+		the device to be disabled, that is, not actively decoding any
+		HPA ranges. This permits avoiding explicit global CPU cache
+		management, relying instead for it to be done when a region
+		transitions between software programmed and hardware committed
+		states.
 
 
 What            /sys/bus/cxl/devices/memX/security/erase
@@ -92,7 +96,12 @@ Contact:        linux-cxl@vger.kernel.org
 Description:
 		(WO) Write a boolean 'true' string value to this attribute to
 		secure erase user data by changing the media encryption keys for
-		all user data areas of the device.
+		all user data areas of the device. This functionality requires
+		the device to be disabled, that is, not actively decoding any
+		HPA ranges. This permits avoiding explicit global CPU cache
+		management, relying instead for it to be done when a region
+		transitions between software programmed and hardware committed
+		states.
 
 
 What:		/sys/bus/cxl/devices/memX/firmware/
-- 
2.41.0


  reply	other threads:[~2023-07-26  5:58 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-26  5:19 [PATCH 0/3] cxl/memdev: Make sanitize interfaces conditionally available Davidlohr Bueso
2023-07-26  5:19 ` Davidlohr Bueso [this message]
2023-07-28 18:01   ` [PATCH 1/3] cxl/memdev: Improve sanitize ABI descriptions Dave Jiang
2023-08-04 14:02   ` Jonathan Cameron
2023-08-11 14:58     ` Davidlohr Bueso
2023-07-26  5:19 ` [PATCH 2/3] cxl/memdev: Document security state in kern-doc Davidlohr Bueso
2023-07-28 18:02   ` Dave Jiang
2023-07-26  5:19 ` [PATCH 3/3] cxl/memdev: Only show sanitize sysfs files when supported Davidlohr Bueso
2023-07-28 18:12   ` Dave Jiang
2023-08-04 14:16   ` Jonathan Cameron
2023-08-04 23:50     ` Davidlohr Bueso
  -- strict thread matches above, loose matches on Subject: below --
2024-04-22  7:01 [PATCH 1/3] cxl/memdev: Improve sanitize ABI descriptions Dongsheng Yang

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20230726051940.3570-2-dave@stgolabs.net \
    --to=dave@stgolabs.net \
    --cc=a.manzanares@samsung.com \
    --cc=dan.j.williams@intel.com \
    --cc=dave.jiang@intel.com \
    --cc=fan.ni@samsung.com \
    --cc=jonathan.cameron@huawei.com \
    --cc=linux-cxl@vger.kernel.org \
    --cc=vishal.l.verma@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox